Seat and backrest of a folding chair



FIG. 1 is a top perspective view of the seat and backrest of a folding chair;

FIG. 2 is a bottom perspective view of the seat and backrest of a folding chair;

FIG. 3 is a right side elevation view of the seat and backrest of a folding chair;

FIG. 4 is a left side elevation view of the seat and backrest of a folding chair;

FIG. 5 is a front elevation view of the seat and backrest of a folding chair;

FIG. 6 is a rear elevation view of the seat and backrest of a folding chair;

FIG. 7 is a top plan view of the seat and backrest of a folding chair; and,

FIG. 8 is a bottom plan view of the seat and backrest of a folding chair.

The broken lines shown in the figures are included for the purpose of illustrating environment only and form no part of the claimed design. 

CLAIM The ornamental design for a seat and backrest of a folding chair, as shown and described. 